The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A270821 Numbers n such that F(n) - n is a prime, where F(n) denotes the n-th Fibonacci number. 2
 6, 8, 16, 26, 28, 76, 148, 159, 808, 848, 916, 1143, 4036, 4959, 43239, 73432, 98716, 144039, 146132 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE fibonacci(6) - 6 = 8 - 6 = 2 that is a prime; fibonacci(8) - 8 = 21 - 8 = 13 that is a prime. MAPLE with(combinat): P:=proc(q) local n; for n from 0 to q do if isprime(fibonacci(n)-n) then print(n); fi; od; end: P(10^5); MATHEMATICA Select[Range[150000], PrimeQ[Fibonacci[#]-#]&] (* Harvey P. Dale, May 03 2018 *) PROG (PARI) lista(nn) = {for(n=1, nn, if(ispseudoprime(fibonacci(n)-n), print1(n, ", "))); } \\ Altug Alkan, Mar 30 2016 CROSSREFS Cf. A000045, A065220, A064269, A069109, A175404. Sequence in context: A067543 A006583 A011989 * A139452 A245643 A299030 Adjacent sequences: A270818 A270819 A270820 * A270822 A270823 A270824 KEYWORD nonn,more AUTHOR Paolo P. Lava, Mar 30 2016 EXTENSIONS a(15)-a(19) from Giovanni Resta, Apr 14 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 26 13:22 EDT 2023. Contains 361549 sequences. (Running on oeis4.)